Drills bits fixings

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Level 1 Diploma in Carpentry and Joinery
PowerPointpresentation
Drills, Bits & Fixings
Unit 114: Prepare and use
carpentry and joinery
Portable Power Tools

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Level 1 Diploma in Carpentry and Joinery
Objectives
To be able to:
3.1 State types and uses of portable power drills
3.2 State the different types and sizes of
screwdriver bits
3.3 State the different types of drill bits
3.4 Identify suitable fixings for different materials
and surfaces
3.5 State methods used to locate services prior
to carrying out the drilling operation

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Level 1 Diploma in Carpentry and Joinery
Also known as the combi drill.
It can be used for a variety of tasks:
• Low speeds for hi-torque screw driving.
• Higher speeds for drilling wood or metal.
• Hammer function adds percussive "blows" for
light duty drilling into masonry.
• Reverse for screw removal.
• Keyless chuck.
• Available corded and cordless.
Drill Drivers

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Level 1 Diploma in Carpentry and Joinery
• Specially engineered to do one job:
drive screws, which it does faster,
easier and better than a drill driver.
• Uses both bit rotation and
concussive blows to power-drive
screws through the thickest,
densest hardwoods.
• Two to three times more turning
power (torque) than the average drill
driver: it can drive long, large
fasteners through wet timber all day
long.
• Instead of a chuck, it has a locking
collet that accepts hex-shanked
driver bits only.
Impact Drivers

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Level 1 Diploma in Carpentry and Joinery
• The hammer drill uses round shank
twist drill bits, and is used for drilling
into different materials such as stone,
masonry, wood and metal.
• Has a percussive hammer action for
boring into brickwork, blockwork and
stone.
• Not suitable for drilling into concrete.
Percussion (Hammer) Drills
Masonry (Hammer) bit

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Level 1 Diploma in Carpentry and Joinery
• Special Direct System rotary
hammer drills are the only
portable power drills capable of
the heaviest work (into
concrete).
• Has a special shank-locking
system so the bit is powered
directly by the drill and is kept
from slipping.
• The rotary/hammer action can
be switched to hammer only so it
can be used as a masonry chisel
for chasing walls.
SDS Drills

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Level 1 Diploma in Carpentry and Joinery
• Time-saving tool used when
a large volume of screws
need to be repeatedly
driven over extended
periods.
• Screws are supplied on a
plastic belt or reel and fed
into the drill.
• Available corded and
cordless.
Auto-feed screwdriver

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Level 1 Diploma in Carpentry and Joinery
Types and Sizes of Screwdriver Bits
Pozi-drivePhillips Slotted

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Level 1 Diploma in Carpentry and Joinery
Twist
High Speed Steel (HSS): suitable for drilling
wood, metal, plastics.
Titanium Nitride (TiN): gold-coloured TiN
coating increases the hardness of the bit but
only really effective in drilling metal.
Brad Point Better initial location in timber than twist drill
Auger
CAUTION: screw worm pulls the bit further into
timber, hugely increasing drilling speed.
Countersink
Countersinking a pilot hole allows a CSK screw
to sit flush with the timber surface.
Snail’s horn (left) produces a cleaner finish
than rosebud (centre). At right, combined drill
bit and sink
Forstner
Guided by the outside rim of the bit means
Forstner bits can be used (in a drill press) to
drill angled holes, holes that partially overlap,
and holes on the edge of the workpiece.
Flat/Paddle/Spade
Drills large holes quickly and cleanly because
design efficiently clears waste from drill hole.
Types and Uses of Drill Bits

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Level 1 Diploma in Carpentry and Joinery
(Rawl) Plastic Plugs
For fixing into brickwork,
blockwork and stone.
Hammer-in (Nailable) Plugs
Hollow Wall Anchor
Cavity Fixings:
For fixing into thin or
hollow walls (plasterboard)
Spring Toggle
Metal Self-Drill
Plasterboard Plugs
Fixings for Different Materials and Surfaces

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Level 1 Diploma in Carpentry and Joinery
Round Wire Nail Masonry Nail
Dry wall screw
(into plasterboard)
Pozidriv Wood Screw
Cut Nail Oval Brad
Annular Ring Nail
Self-cutting screw
(into sheet metal)
Nails & Screws

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Level 1 Diploma in Carpentry and Joinery
Kitchen Fitters’ Cabinet Spacers

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Level 1 Diploma in Carpentry and Joinery
Methods used to locate services
When drilling into walls, floors and ceilings,
site workers must avoid services to the
building:
• Electric cables
• Gas pipes
• Fresh water pipes
• Black water pipes
• Telecommunications cables
Building Regulations require that services
must be carefully located at set depths,
heights and positions in buildings (eg
vertical cabling from a socket). HOWEVER,
this is not always complied with. So, prior
to work, tradesmen must always use a
digital detector to locate and avoid buried
services and identify stud work that can be
drilled or nailed into.